Flu During Pregnancy Linked to Autism, University of Aarhus Study

Kids whose mothers had the flu while pregnant were slightly more likely to be diagnosed with "infantile autism" before age three in a new Danish study. But the children's overall risk for the developmental disorder was not higher than that of other kids.

Researchers said it's possible that activation of a mother's immune system - such as by infection with the influenza virus - could affect a fetus's developing brain. But they urged caution with the new findings, especially because of statistical limitations in their number-crunching.